CN115255827B - Odd-gear input shaft of double-clutch transmission and processing method thereof - Google Patents

Odd-gear input shaft of double-clutch transmission and processing method thereof Download PDF

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Publication number
CN115255827B
CN115255827B CN202210903066.6A CN202210903066A CN115255827B CN 115255827 B CN115255827 B CN 115255827B CN 202210903066 A CN202210903066 A CN 202210903066A CN 115255827 B CN115255827 B CN 115255827B
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section
machining
odd
hole
input shaft
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CN115255827A (en
Inventor
周仁杰
刘井泽
王乐
袁博
张瑜
王健夫
张人搏
仉天玺
霍星宇
马旭东
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FAW Group Corp
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FAW Group Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Abstract

An odd-numbered gear input shaft of a double-clutch transmission and a processing method relate to the technical field of part processing and solve the problems of high equipment cost and poor processing precision. The method comprises the following steps: clamping and turning the M2 section to the M3 section, supporting a center frame on the M3 section, drilling a K3 slender hole inwards from the tail end surface of the blank, and boring and processing a B1 center hole; loosening the center frame, and tightly propping the center hole B1 by the tip of the tailstock to carry out rough finishing on the sections M3 and M4 of the blanks; the center frame is supported on the section M4, a gear T1 is machined, a hole K1-1 and a hole K1-2 are machined, and a circular arc groove G1 is machined; the equipment claw is replaced by a workable claw, the inner ring of the claw is subjected to boring processing, and after the part turns around, the M4 section is clamped; drilling the B2 central hole, and carrying out sectional machining on the diameters of the M2 section and the M1 section; the center frame is supported on the section M1, and the spline H1 is subjected to gear shaping processing.

Description

Odd-gear input shaft of double-clutch transmission and processing method thereof
Technical Field
The invention relates to the technical field of part machining, in particular to a machining technology of an odd-numbered gear input shaft of a double-clutch transmission.
Background
Today, with the rapid development of the automotive industry, dual clutch transmissions have been widely used by various large vehicle enterprises for their excellent performance and fuel economy. In the structure of the dual clutch transmission, there are two sets of input shafts, an odd-numbered stage input shaft and an even-numbered stage input shaft, respectively. The even-gear input shaft is a hollow long shaft, the odd-gear input shaft is a solid long shaft, and the odd-gear input shaft and the odd-gear are pressed together and arranged in the even-gear input shaft. The processing precision of the input shaft directly influences the assembly precision and the operation stability of the whole transmission under the working condition of high operation and high load for a long time. Therefore, the machining accuracy of the odd-numbered stage input shafts is required to be high.
In the prior art, an odd-numbered gear input shaft is usually machined in a process dispersion mode, namely, a numerical control lathe is used for rough and finish machining of the diameter of a rotary shaft, a machining center is used for drilling machining, a gear shaper is used for gear shaping machining, the equipment price is high, the production and manufacturing period of a clamp is long, and the device cannot be applied to small-batch production trial production.
In the prior art, the odd-numbered stage input shaft of the double clutch transmission adopts the following processing modes:
(1) Machining all the rotation surfaces of the odd-numbered gears input shaft by using a numerical control lathe;
(2) Drilling radial holes on the parts by using a machining center;
(3) Performing gear shaping processing on the spline part by using a gear shaping machine;
(4) The tooth portion is subjected to gear hobbing using a gear hobbing machine.
In the existing processing technology, various devices and multiple sets of fixtures are needed to be repeatedly disassembled and clamped, different positions of parts are processed, the use cost of the devices is high, meanwhile, precision loss of the parts is caused in the repeated clamping process of the parts, spline precision and gear precision and runout precision between positioning shaft diameters cannot be guaranteed, particularly, the odd-gear input shaft is an slender shaft, vibration is easy to generate in the processing due to poor integral rigidity in the gear shaping and gear hobbing process, and precision of the processed spline and gear in the tooth shape and the tooth direction cannot be guaranteed.
Disclosure of Invention
The invention provides a double-clutch transmission odd-numbered stage input shaft and a processing method thereof, aiming at solving the problems of high cost and poor processing precision in the prior art.
The technical scheme of the invention is as follows:
the processing method of the odd-numbered gears input shaft of the double clutch transmission comprises the following steps that the processing raw material is a blank with a circular cross section and in a long strip shape, the blank is divided into four sections of areas M1, M2, M3 and M4 from the head section to the tail end in sequence:
s1, clamping an M2 section on a turning and milling composite equipment chuck through an equipment claw, turning an M3 section, supporting a center frame on the turned M3 section, calling a drill bit to drill a K3 slender hole inwards from the tail end face of a blank, and calling a boring cutter to boring and process a B1 center hole on the tail end face of the blank;
s2, loosening the center frame, tightly jacking the center hole of the B1 by the tip of the tailstock, firstly carrying out rough machining on the sections M3 and M4 of the blank, and then carrying out finish machining on the sections M3 and M4 of the blank;
s3, supporting a center frame on the machined section M4, calling a hobbing cutter to machine a gear T1 on the section M3, then calling a drill bit with the diameter of 3mm to machine a hole K1-1 and a hole K1-2 on the section M4, and finally machining a circular arc groove G1 by taking the holes K1-1 and K1-2 as the centers;
s4, replacing the equipment claw with a processable claw, calling an inner hole boring cutter to carry out boring processing on the inner ring of the processable claw, and clamping the M4 section on the turned processable claw after turning around the part processed in the step S3;
s5, calling a center drill to drill a B2 center hole, starting a turning and milling composite tailstock center to tightly jack the B2 center hole, turning a position close to the M3 section in the M2 section, supporting a center frame at a turning position, machining the rest part of the M2 section, supporting the center frame at a position close to the M1 section in the M2 section, machining the M1 section, and finally calling a 3mm drill bit to drill a K2 hole in the M1 section;
s6, supporting the center frame at the M1 section position, and calling a gear shaping cutter to perform gear shaping processing on the spline H1.
Preferably, the axial-radial relationship of the four sections of M1, M2, M3 and M4 is as follows: m1 is more than or equal to M4 is more than or equal to M2 is more than or equal to M3.
Preferably, the roughness after boring the center hole in the step S1 satisfies ra1.6, and the runout is not more than 0.008mm.
Preferably, the roughing in step S2 is a 75 ° roughing tool.
Preferably, the finishing in step S2 employs a 93 ° pointed knife.
Preferably, a single-side margin of 0.1mm is left after the rough machining in step S2.
Preferably, in step S3, the G1 circular arc groove is machined by using a middle pointed blade or a circular arc groove blade.
Preferably, the diameter of the inner ring of the claw after boring in the step S4 is larger than the diameter of the shaft D1 by 0.5mm and the runout is not larger than 0.01mm.
Preferably, the processable pawl in step S4 is an aluminum pawl.
The invention also provides an odd-numbered gear input shaft of the double-clutch transmission, which is manufactured by the processing method.
Compared with the prior art, the invention solves the problems of high equipment cost and poor processing precision, and has the following specific beneficial effects:
1. according to the method for adding the odd-numbered gears of the double-clutch transmission, provided by the invention, the single equipment is adopted to process different positions of parts, multiple equipment and multiple sets of clamps are not required to be repeatedly disassembled and clamped, so that the equipment cost is saved, the product process chain is shortened, the production efficiency is improved, the processing period of equipment claws is short, and the method can be applied to small-batch production trial production.
2. The special processing sequence and the processing technology provided by the invention can effectively avoid the precision loss of the tooth shape and the tooth direction of the spline and the gear in the processing process, and ensure the precision of the spline, the precision of the gear and the runout precision between the spline and the positioning shaft diameter.
Drawings
FIG. 1 is a schematic diagram of a process flow according to the present invention;
FIG. 2 is a schematic illustration of a blank structure of an odd-numbered stage input shaft according to embodiment 1;
FIG. 3 is a schematic front view of the odd-numbered stage input shaft;
FIG. 4 is a schematic cross-sectional view of the odd-numbered stage input shaft;
fig. 5 is an enlarged schematic view of the G1 circular arc groove portion described in example 1.
FIG. 6 is a schematic diagram of the clamping state of the equipment claw;
FIG. 7 is a schematic view of a workable jaw inner race;
FIG. 8 is a schematic diagram of a clamping state of a processable jaw;
Detailed Description
In order to make the technical solution of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it should be noted that the following embodiments are only used for better understanding of the technical solution of the present invention, and should not be construed as limiting the present invention.
Example 1.
The process flow diagram is shown in fig. 1, the processed raw material is a blank with a circular cross section and is divided into four sections of areas of M1, M2, M3 and M4 from the head section to the tail section in sequence, as shown in fig. 2, the front view diagram of the odd-gear input shaft of the dual clutch transmission processed by the method in the embodiment is shown in fig. 3, and for better understanding, referring to fig. 4, the process method comprises the following steps:
s1, clamping an M2 section on a turning and milling composite equipment chuck through an equipment claw, wherein the clamping state is shown in a figure 6, turning an M3 section, supporting a center frame on the turned M3 section, calling a drill bit to drill a K3 slender hole inwards from the tail end face of a blank, and calling a boring cutter to boring and process a B1 center hole on the tail end face of the blank;
s2, loosening the center frame, tightly jacking the center hole of the B1 by the tip of the tailstock, firstly carrying out rough machining on the sections M3 and M4 of the blank, and then carrying out finish machining on the sections M3 and M4 of the blank;
s3, supporting a center frame on the machined section M4, calling a hobbing cutter to machine a gear T1 on the section M3, then calling a drill bit with the diameter of 3mm to machine a hole K1-1 and a hole K1-2 on the section M4, and finally machining a circular arc groove G1 by taking the holes K1-1 and K1-2 as the centers;
s4, replacing the equipment claw with a processable claw, and calling an inner hole boring cutter to carry out boring processing on an inner ring of the processable claw, wherein the schematic diagram of the inner ring of the claw is shown in FIG. 7, and after turning around the part processed in the step S3, clamping the M4 section on the turned processable claw, as shown in FIG. 8;
s5, calling a center drill to drill a B2 center hole, starting a turning and milling composite tailstock center to tightly jack the B2 center hole, turning a position close to the M3 section in the M2 section, supporting a center frame at a turning position, machining the rest part of the M2 section, supporting the center frame at a position close to the M1 section in the M2 section, machining the M1 section, and finally calling a 3mm drill bit to drill a K2 hole in the M1 section;
s6, supporting the center frame at the M1 section position, and calling a gear shaping cutter to perform gear shaping processing on the spline H1.
In the embodiment, the step S2 is used for carrying out rough machining and finish machining on the M3 section and the M4 section separately, so that the stability of the machining precision is ensured while the requirements of the diameter tolerance grade h7 and the cylindricity of 0.02mm of the machining position are met;
step S3, firstly machining M3 and M4 sections of shaft diameters, and then machining a G1 arc groove, wherein an enlarged schematic diagram of the G1 arc groove is shown in FIG. 5, so that the risk of breakage of a drill bit caused by swing of the drill bit at the bottom of the arc groove is avoided, and the problem that the left and right arcs of the center line of the machined G1 arc groove are asymmetric and influence on subsequent assembly caused by different angles of a front angle and a rear angle of a cutter when the G1 arc groove is machined by a sharp cutter is avoided;
in the step S5, after the B2 center hole drilling is finished, the position close to the M3 section in the M2 section is turned firstly, and the position is positioned at a relatively good rigidity position and is nearest to the chuck, so that the phenomena of vibration and cutter yielding are avoided, and the jumping precision of the shaft diameter is ensured; compared with the conventional processing mode, the sectional type processing is adopted in the step, the overall rigidity of the turning position can be ensured in the processing process, and then the cutting speed and the cutting depth can be improved, and the processing quality and the processing efficiency of the product can be obviously improved;
step S6 utilizes the center frame to carry out auxiliary stay to the D4 diameter of shaft and reprocesss the spline and adopts two top modes to process for the gear shaper, and advantage lies in that the spline position has sufficient rigidity, has avoided producing vibration at the gear shaping in-process part and has caused spline precision loss, and spline and diameter accomplish the processing in a clamping simultaneously, furthest has guaranteed the precision of beating between spline and the diameter of shaft.
Example 2.
This example is a further illustration of example 1, where the axial-radial relationship of the four sections M1, M2, M3, and M4 is: m1 is more than or equal to M4 is more than or equal to M2 is more than or equal to M3.
The blank shape of the odd-numbered gears adopted in the embodiment is designed according to the shape of the finished product input shaft after processing, so that the subsequent processing is easy, and the material cost is saved.
Example 3.
This example is a further illustration of example 1, wherein the roughness after boring the center hole in step S1 satisfies ra1.6, and the runout is not more than 0.008mm.
Example 4.
This example is a further illustration of example 1, wherein the roughing step S2 employs a 75 ° roughing tool.
Example 5.
This example is a further illustration of example 1, where the finishing operation described in step S2 employs a 93 ° pointed knife.
Example 6.
This example is a further illustration of example 1, where a 0.1mm single sided margin is left after the roughing described in step S2.
Example 7.
In this embodiment, for further illustration of embodiment 1, the G1 circular arc groove in step S3 is machined by using a center pointed blade or a circular arc groove blade.
Example 8.
This example is a further illustration of example 1, wherein the diameter of the inner ring of the jaw after boring in step S4 is greater than 0.5mm of the diameter of the D1 shaft and the runout is not greater than 0.01mm.
Example 9.
This example is a further illustration of example 1, wherein the machinable pawl in step S4 is an aluminum pawl.
In order to adapt to M4 section diameter of axle, with M4 section clamping on the jack catch, this embodiment changes equipment jack catch into aluminium system jack catch, and the material is softer than the part of centre gripping, and easy processing, with low costs.
Example 10.
The embodiment provides a double-clutch transmission odd-gear input shaft which is manufactured by the method in any one of embodiments 1-9.
The odd-numbered shelves input shaft of dual clutch transmission adopts single equipment to process the different positions of part, need not multiple equipment, many sets of anchor clamps and dismantle the clamping repeatedly, has practiced thrift the cost, and equipment jack catch machining cycle is short, can obtain the application in the trial production of small batch production, and avoided causing the precision loss of part in the clamping process repeatedly, guarantee spline precision and gear precision and with the location accuracy of beating between the diameter of axle.

Claims (10)

1. The machining method of the odd-numbered gears input shaft of the double-clutch transmission is characterized in that the machining raw material is a blank with a circular cross section and in a long strip shape, the blank is divided into four sections of areas M1, M2, M3 and M4 from the head section to the tail end in sequence, and the machining method comprises the following steps:
s1, clamping an M2 section on a turning and milling composite equipment chuck through an equipment claw, turning an M3 section, supporting a center frame on the turned M3 section, calling a drill bit to drill an elongated hole (K3) inwards from the tail end face of a blank, and calling a boring cutter to boring and process a first center hole (B1) on the tail end face of the blank;
s2, loosening the center frame, tightly jacking the tail seat top tip to the first center hole (B1), firstly performing rough machining on the blank M3 and the blank M4, and then performing finish machining on the blank M3 and the blank M4;
s3, supporting a center frame on a machined M4 section, calling a hobbing cutter to machine a gear (T1) on the M3 section, then calling a drill bit with the diameter of 3mm to drill a first radial hole (K1-1) and a second radial hole (K1-2) which are coaxial on the M4 section, and finally machining an arc groove (G1) by taking the first radial hole (K1-1) and the second radial hole (K1-2) as the centers;
s4, replacing the equipment claw with a processable claw, calling an inner hole boring cutter to carry out boring processing on the inner ring of the processable claw, and clamping the M4 section on the turned processable claw after turning around the part processed in the step S3;
s5, calling a center drill to drill a second center hole (B2), starting a turning and milling composite tailstock center to jack the second center hole (B2), turning a position close to a position of a section M3 in the section M2, supporting a center frame at the turning position, machining the rest part of the section M2, supporting the center frame at the position close to the position of the section M1 in the section M2, machining the section M1, and finally calling a 3mm drill bit to drill a third radial hole (K2) in the section M1;
s6, supporting the center frame at the M1 section position, and calling a gear shaping cutter to perform gear shaping processing on the spline (H1).
2. The method for machining the odd-numbered gears input shaft of the dual clutch transmission according to claim 1, wherein the shaft diameter relation among the four sections of areas M1, M2, M3 and M4 is as follows: m1 is more than or equal to M4 is more than or equal to M2 is more than or equal to M3.
3. The method for machining the odd-numbered gears input shaft of the dual clutch transmission according to claim 1, wherein the roughness of the first center hole (B1) after boring in the step S1 satisfies Ra1.6, and the runout is not more than 0.008mm.
4. The method for machining an odd-numbered stage input shaft of a dual clutch transmission according to claim 1, wherein the rough machining in step S2 adopts a 75 ° rough turning tool.
5. The method of claim 1, wherein the finishing in step S2 is performed using a 93 ° pointed knife.
6. The method for machining an odd-numbered stage input shaft of a dual clutch transmission according to claim 1, wherein a single-side margin of 0.1mm is left after the rough machining in step S2.
7. The method for machining the odd-numbered gears input shaft of the double-clutch transmission according to claim 1, wherein the circular arc groove (G1) in the step S3 is machined by a middle pointed knife or a circular arc groove knife.
8. The method for machining the odd-numbered gears input shaft of the double-clutch transmission according to claim 1, wherein the diameter of the inner ring of the claw after boring in the step S4 is larger than the diameter of the M4 section shaft by 0.5mm and the runout is not larger than 0.01mm.
9. The method of claim 1, wherein in step S4, the machinable jaw is an aluminum jaw.
10. An odd-numbered gear input shaft of a double clutch transmission, characterized in that it is manufactured by applying the manufacturing method according to any one of claims 1-9.
CN202210903066.6A 2022-07-29 2022-07-29 Odd-gear input shaft of double-clutch transmission and processing method thereof Active CN115255827B (en)

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CN109048241A (en) * 2018-08-16 2018-12-21 南昌齿轮锻造厂 A kind of method of automobile gearbox input shaft forging and its blank roughing forming
CN110014274A (en) * 2019-05-16 2019-07-16 重庆綦同汽车配件有限责任公司 The Varied pole piece tooth processing method of input shaft
KR20190108251A (en) * 2018-03-14 2019-09-24 (주)성진포머 Manufacturing method for integrated input shaft and integrated input shaft thereof

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Publication number Priority date Publication date Assignee Title
KR100878113B1 (en) * 2008-10-17 2009-01-14 김동욱 Manufacturing method for car's steering part's input shaft and thereof product
CN102862020A (en) * 2011-07-07 2013-01-09 梦想科技股份有限公司 Input shaft of steering device for car and manufacturing method thereof
CN103551821A (en) * 2013-10-18 2014-02-05 无锡利日能源科技有限公司 Transmission shaft processing method
CN103737270A (en) * 2013-12-04 2014-04-23 鞠小平 Method for machining input shaft of main reducing gear of heavy load automobile
KR20150093942A (en) * 2014-02-10 2015-08-19 장준수 Input shaft and the manufacture method for car gearbox
CN104439953A (en) * 2014-11-11 2015-03-25 重庆建设工业(集团)有限责任公司 Machining method of upper portion of input shaft of steering gear
CN107009102A (en) * 2015-11-06 2017-08-04 大众汽车有限公司 Method for manufacturing power transmission shaft
KR101728339B1 (en) * 2016-02-05 2017-04-20 명화공업주식회사 Manufacturing method for input shaft
CN107138917A (en) * 2017-05-12 2017-09-08 宁波创世轴业有限公司 A kind of manufacture method of input shaft
KR20190108251A (en) * 2018-03-14 2019-09-24 (주)성진포머 Manufacturing method for integrated input shaft and integrated input shaft thereof
CN109048241A (en) * 2018-08-16 2018-12-21 南昌齿轮锻造厂 A kind of method of automobile gearbox input shaft forging and its blank roughing forming
CN110014274A (en) * 2019-05-16 2019-07-16 重庆綦同汽车配件有限责任公司 The Varied pole piece tooth processing method of input shaft

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